I had no trouble downloading, unzipping, and installing it just a few minutes ago, got into the menu and codex and could see the ships just fine. I'm using 7zip over here, maybe there's an incompatibility between what his majesty and 2_Wycked is using for zipping.

So uh, the GM Hammerhead has less than a minute of PPT, I haven't gotten my hands on any other GM ships yet but it feels wrong that even with hardened subsystems a destroyer is best compared to an SO Lasher

edit: looking through the codex most of the baseline GM ships seem to fall FAR below what I would call "minimally viable" PPT, with a base PPT on the Lasher GM of 36 seconds there's just no realistic scenario in which the ship can be useful except extremely small, low intensity fights, and even there it will suffer grossly due to having all its cargo and fuel capacity stripped out. The benefits of the GMDA retrofit seem to be pretty comparable to just installing SO, but the downsides are massively more severe.

They have the burn level of Lashers too, they need a crippling downside otherwise their "Our destroyers catch your fast frigate swarm" property would make them more obnoxious on the campaign map than the Templars. Safety Overrides doesn't give you a bonus to burn speed. GM Hammerheads aren't competing with vanilla Hammerheads, they're competing with Wolfs and Lashers.

I suppose? I think CR per deployment would be a better stat to hammer into the dirt than to give a destroyer less than half the PPT of a frigate.

It's kind of a playstyle thing; if you're playing as a player with the ship, then the poor peak time restricts it's usage to short bursts (as intended). If you're playing against the AI who have these ships, then the obvious strategy is to wait them out, then mob them once their CR has dropped to 0%. Further, it prevents their repeated usage anyway due to poor peak time.

Also lore-wise they're supposed to run out of steam quickly - they're a lot of rather questionable modifications added to existing ships that make them fast, without much thought into anything else. Heck, the reduced armour is often listed as a feature. The GM Tarsus and GM Condor are both actually garbage when you look look at it objectively. The only situations they're supposed to be good in is high-speed pursuit or very fast hit-and-run ttacks, hence making them an annoying if very niche sort of ship style.

From the steaming depths of Lanchishire Station Tea Buffet, comes a chilling new update to the GMDA: The "Logistcal Update", now with improved sprites, the Tarsus (GM) is now no longer complete garbage (but it's still pretty bad), the Tarsus (GMs) is now a little bit better (but not by much), two new civilian ships to replace the Tarsus (GMs), and some touching up of the Wayfarer Sprites. Also reduced the number of fleets you'll encounter so putting this on while playing as a faction is no longer suicide. This change will only apply to new games, however.